Originally posted by Kamloops50
In enhanced 911 system , GPS from the phone is the primary source of location. If the phone doesn't have GPS or turned off , they use triangulation from cell towers . Not all mobile devices have built in GPS. I have a pad and cellphone that don't have built in GPS.

Yes all phones are tracked when in use , more big government in place.

Can someone post a link to open source maps for map apps.

The Pocket Earth IOS App uses Open Street Maps as it's source of mapping data. The App downloads the maps of your choice automatically meaning you do not have to go to the website yourself.

Below is their webpage link. I am not sure how you would use it without an App or GPS device of some sort.

Assuming you have paid for wi-fi connection, why not use this app :-https://www.vesselfinder.com/
It will give you your ships' current position, course and speed. If you mouse over the map, it'll give you national grid references and also the names of other ships in the vicinity

I thought just about all devices had a GPS receiver in them these days. I use OSMAnd on my Android phone. I have the nautical charts downloaded so that I'll be able to monitor our trans-atlantic trips in December. Open Street Maps has a wiki, and the page discussing iOS is:http://wiki.openstreetmap.org/wiki/Apple_iOS